... harmful gases in vehicles, such as benzene,formaldehyde,ammonia and TVOC,up-to-standard rate:98%2.sterilize the harmful bacteria in ... .remove the smog in vehicles,neutralize nicotine,prevent smoking harm and tailgas pollution4.remove peculiar or off odor5.refresh the air ... . B.Feature:1.electification,24-hour operating,convenient and timely2.no secondary pollution and using injury C.Use:put in the air ...